Abstract: A battery charger includes an irregular power source, a capacitor connected to the power source for storing charge from the power source, and a control circuit which is operable to detect a charge current of a battery to be charged and to discharge the charge from the capacitor into the battery when the charge in the capacitor reaches a predetermined level. The control circuit is configured to change the predetermined level from a bulk charge mode to a float charge mode when the charge current is at or below a threshold value.

Abstract: A display assembly includes a first display element which displays letters, numbers, and/or images when power is applied to it and which continues to display the letters, numbers and/or images after the power is no longer applied to it; and a second display element which only operates whilst power is applied to it. The first display element may be a cholesteric panel or a bistable nematic panel, or may use e-ink technology to display letters, numbers and/or images. The second display element may comprise one or more light sources such as LEDs.